CN104265568A - Control method, control device and control system for power per liter of fan - Google Patents
Control method, control device and control system for power per liter of fan Download PDFInfo
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- CN104265568A CN104265568A CN201410431946.3A CN201410431946A CN104265568A CN 104265568 A CN104265568 A CN 104265568A CN 201410431946 A CN201410431946 A CN 201410431946A CN 104265568 A CN104265568 A CN 104265568A
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- blower fan
- generator
- setting value
- per liter
- speed
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- 238000000034 method Methods 0.000 title claims abstract description 71
- 230000001133 acceleration Effects 0.000 claims description 62
- 238000001914 filtration Methods 0.000 claims description 31
- 230000010354 integration Effects 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 10
- 241000505673 Scintilla Species 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 22
- 230000000694 effects Effects 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0256—Stall control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/101—Purpose of the control system to control rotational speed (n)
- F05B2270/1012—Purpose of the control system to control rotational speed (n) to prevent underspeed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/103—Purpose of the control system to affect the output of the engine
- F05B2270/1033—Power (if explicitly mentioned)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/327—Rotor or generator speeds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a control method, a control device and a control system for power per liter of a fan. The control method includes acquiring a variable-pitch speed set value of the fan according to a first cabin accelerated speed of a fan cabin in the wind coming direction and a rotating-speed measured value of a generator of the fan; acquiring an electromagnetic torque set value of the generator according to a second cabin accelerated speed of the cabin in the direction vertical to the wind coming direction and the rotating-speed measured value of the generator; inputting the variable-pitch speed set value and the electromagnetic torque set value into the fan. By the control method, the control device and the control system, failures such as instability of the fan during operation and overspeeding of the generator can be effectively avoided, high power per liter of the generator is guaranteed, and remarkable low-frequency fluctuation of variable-pitch speed, rotating speed and the electromagnetic torque set value of the generator and output power of the fan as well as overspeeding of the generator can be avoided.
Description
Technical field
The present invention relates to technical field of wind power, particularly relate to a kind of power per liter progress control method, Apparatus and system of blower fan.
Background technique
Directly drive megawatt blower fan under operating mode of generating electricity by way of merging two or more grid systems, electrical network can carry out limit Power operation by the energy management device in central monitoring system to the blower fan of wind energy turbine set and control.Be no matter blower fan be transported to grid power descending power process falls, or in ascending power per liter process, all define the rate of power change that respective numerical value is fixing.
When energy management platform starts, and blower fan is transported in the ascending power per liter process of grid power, if power per liter speed value is slightly large, megawatt fan operation will unstability, be embodied in change oar speed, generator speed low-frequency fluctuation amplitude is increasing, until generator speed is overrun, fault occurs.
Summary of the invention
The embodiment of the present invention provides a kind of power per liter progress control method, Apparatus and system of blower fan, realizes dynamic adjustments power per liter speed, and unstability and generator speed such as to be overrun at the fault effectively to avoid fan operation to occur.
For achieving the above object, embodiments of the invention adopt following technological scheme:
A power per liter progress control method for blower fan, wherein, the method comprises the steps:
Obtain the change oar speed setting value of described blower fan at the rotating speed measured value of the first cabin acceleration in direction of the wind comes from and the generator of described blower fan according to the cabin of blower fan;
Obtain the electromagnetic torque setting value of described generator at the second cabin acceleration in the direction vertical with described direction of the wind comes from and the rotating speed measured value of described generator according to described cabin;
Described change oar speed setting value and described electromagnetic torque setting value are inputed to described blower fan, so that described blower fan regulates the power per liter speed of described blower fan in power per liter process according to described change oar speed setting value and described electromagnetic torque setting value.
A power per liter operating control device for blower fan, wherein, this device comprises:
First acquisition module, for obtaining the change oar speed setting value of described blower fan at the rotating speed measured value of the first cabin acceleration in direction of the wind comes from and the generator of described blower fan according to the cabin of blower fan;
Second acquisition module, for obtaining the electromagnetic torque setting value of described generator at the second cabin acceleration in the direction vertical with described direction of the wind comes from and the rotating speed measured value of described generator according to described cabin;
Transmission module, for described change oar speed setting value and described electromagnetic torque setting value are inputed to described blower fan, so that described blower fan regulates the power per liter speed of described blower fan in power per liter process according to described change oar speed setting value and described electromagnetic torque setting value.
A power per liter operation control system for blower fan, wherein, this system comprises:
The power per liter operating control device of the blower fan described in Bian Jiang actuator, current transformer and technique scheme; Wherein,
The power per liter operating control device of described blower fan calculates and becomes oar speed setting value and electromagnetic torque setting value, and described change oar speed setting value and described electromagnetic torque setting value are inputed to described Bian Jiang actuator and described current transformer respectively;
Described Bian Jiang actuator becomes oar speed according to described change oar speed setting value adjustment;
Described current transformer according to described electromagnetic torque setting value adjustment generator speed, thus regulates the power per liter speed of described generator in power per liter process.
The power per liter progress control method of the blower fan that the embodiment of the present invention provides, Apparatus and system, by direction of the wind comes from, the first cabin acceleration of direction this both direction perpendicular with direction of the wind comes from and the rotating speed measured value of the second cabin acceleration and generator, regulate the power per liter speed of blower fan in power per liter process, unstability and generator speed such as to be overrun at the fault can effectively to avoid blower fan to occur in running, ensure generator power per liter speed faster, thus blower fan can be made to carry more power to electrical network; In addition, can also avoid becoming oar speed, generator speed, generator electromagnetic torque setting value, blower fan output power significantly low-frequency fluctuation and generator fault of overrunning occur.
Accompanying drawing explanation
The schematic flow sheet of the power per liter progress control method of the blower fan that Fig. 1 provides for one embodiment of the invention;
Fig. 2 is the direction of the wind comes from of blower fan in the embodiment of the present invention, the schematic diagram in the direction vertical with direction of the wind comes from;
The schematic flow sheet of the power per liter progress control method of the blower fan that Fig. 3 provides for another embodiment of the present invention;
Fig. 4 is the coordinate relation schematic diagram between middle DG Differential Gain coefficient embodiment illustrated in fig. 3 and the first difference;
Fig. 5 is the schematic diagram by the unit step response of wave filter in prior art;
Fig. 6 be embodiment illustrated in fig. 3 in control the schematic diagram of unit step response by PD;
The structural representation of the power per liter operating control device of the blower fan that Fig. 7 provides for one embodiment of the invention;
The structural representation of the power per liter operating control device of the blower fan that Fig. 8 provides for another embodiment of the present invention;
The structural representation of the power per liter operation control system of the blower fan that Fig. 9 provides for one embodiment of the invention;
The circuit structure diagram of the power per liter operation control system of the blower fan that Figure 10 provides for the embodiment of the present invention;
The schematic diagram of the Steady Wind of 15m/s of Figure 11 for adopting in the embodiment of the present invention;
Figure 12 to be the embodiment of the present invention with prior art become in 50Kw/s power per liter process oar speed compare schematic diagram;
Figure 13 generator speed that is the embodiment of the present invention with prior art in 50Kw/s power per liter process compare schematic diagram;
Figure 14 be the embodiment of the present invention with the output power of prior art blower fan in 50Kw/s power per liter process compare schematic diagram;
Figure 15 My moment of flexure that is the embodiment of the present invention with prior art in 50Kw/s power per liter process bottom tower cylinder compare schematic diagram;
Figure 16 blade root My moment of flexure that is the embodiment of the present invention with prior art in 50Kw/s power per liter process compare schematic diagram.
Embodiment
Being described in detail of the power per liter progress control method of blower fan, Apparatus and system is provided to the embodiment of the present invention below in conjunction with accompanying drawing.
First embodiment:
The schematic flow sheet of the power per liter progress control method of the blower fan that Fig. 1 provides for one embodiment of the invention, Fig. 2 is the direction of the wind comes from of blower fan in the embodiment of the present invention, the schematic diagram in the direction vertical with direction of the wind comes from; As shown in Figure 1, the power per liter progress control method of this blower fan comprises the steps:
Step 101, obtain the change oar speed setting value of blower fan at the rotating speed measured value of the first cabin acceleration in direction of the wind comes from and the generator of blower fan according to the cabin of blower fan.
Step 102, obtain the electromagnetic torque setting value of generator at the second cabin acceleration in the direction vertical with direction of the wind comes from and the rotating speed measured value of generator according to cabin.
Step 103, change oar speed setting value and electromagnetic torque setting value are inputed to blower fan, so that blower fan regulates the power per liter speed of blower fan in power per liter process according to change oar speed setting value and electromagnetic torque setting value.
As shown in Figure 2, XT represents the direction of the wind comes from of blower fan 90, and this direction of the wind comes from specifically illustrates the direction towards blower fan 90, and YT represents the direction vertical with direction of the wind comes from, and ZT represents the direction of vertical ground.First cabin acceleration and the second cabin acceleration are got by the acceleration transducer be arranged in cabin respectively.The rotating speed measured value of generator is the real-time rotate speed value of generator, by monitoring this rotating speed measured value, thus obtains becoming oar speed setting value.
The power per liter progress control method of the blower fan that the embodiment of the present invention provides, by direction of the wind comes from, the first cabin acceleration of direction this both direction perpendicular with direction of the wind comes from and the rotating speed measured value of the second cabin acceleration and generator, regulate the power per liter speed of blower fan in power per liter process, unstability and generator speed such as to be overrun at the fault can effectively to avoid blower fan to occur in running, ensure generator power per liter speed faster, thus blower fan can be made to carry more power to electrical network; In addition, can also avoid becoming oar speed, generator speed, generator electromagnetic torque setting value, blower fan output power significantly low-frequency fluctuation and generator fault of overrunning occur.
Second embodiment:
The schematic flow sheet of the power per liter progress control method of the blower fan that Fig. 3 provides for another embodiment of the present invention, Fig. 4 is the coordinate relation schematic diagram between middle DG Differential Gain coefficient embodiment illustrated in fig. 3 and the first difference; As shown in Figure 3, the method comprises the steps:
Step 301, obtain the peak-to-peak value of generator speed according to the generator speed measured value of blower fan.
Step 302, obtain the speed setting value of generator according to the peak-to-peak value of generator speed.
Wherein, in step 301 and step 302, in the power per liter process that the output power of blower fan increases from small to large, can the fluctuating range of peak-to-peak value when rotating speed low frequency of Real-Time Monitoring generator; Meet the condition of predetermined threshold value in the fluctuating range of peak-to-peak value under, by the output power setting value of generator divided by open after optimal control gain cube (
), particularly, when generator is in optimum gain control, the electromagnetic torque of its correspondence is:
Output power during optimum gain is:
The rated speed of generator is
In above-mentioned formula (1) ~ formula (3), Q
dfor the electromagnetic torque of blower fan, P
dfor the output power of blower fan, K
optfor optimum gain, n
ratedfor the rated speed of blower fan.Owing to being according to optimum gain K
optwith rated speed n
ratedcalculate the electromagnetic torque Q of blower fan successively
dwith output power P
d, but the embodiment of the present invention is according to blower fan output power P
dcarry out calculating generator rotary speed setting value, so the rotary speed setting value that formula (3) obtains generator can be passed through, further, the rotary speed setting value demand fulfillment of generator:
thus ensure that rotary speed setting value is less than or equal to the rated speed of generator.Further, the fluctuating range size that predetermined threshold value is changed by load (such as, the load at the place such as My moment of flexure bottom blade root My moment of flexure, tower cylinder) and adjusting, the occurrence of the embodiment of the present invention to predetermined threshold value does not limit.
Step 303, obtain first according to the cabin of blower fan at the first cabin acceleration in direction of the wind comes from and become oar speed.
Preferably, in step 303, first bandpass filtering can be carried out at the first cabin acceleration in direction of the wind comes from the cabin of blower fan; Then the first cabin acceleration after bandpass filtering can be carried out filtering by second order filter; Finally can (unit be m/s by the first cabin acceleration after second-order filter
2) be multiplied by the first proportional gain, obtain the first change oar speed (unit is deg/s), this first proportional gain is constant, and dimension becomes oar speed by the first cabin acceleration and first and determines.
Step 304, obtain second according to the speed setting value of generator and the rotating speed measured value of generator and become oar speed.
Preferably, in step 304, first, the rotating speed measured value of the speed setting value of generator and generator can be subtracted each other, obtain the first difference; Then carry out proportion differential (Proportional Differential, referred to as PD) controlling calculation according to the first difference and obtain the first intermediate value; Finally the first intermediate value can be carried out lower pass-filter, obtain the second change oar speed.
Further, obtain in the step of the first intermediate value carrying out PD controlling calculation according to the first difference, first the first difference can be carried out differential calculation, by the first difference determination DG Differential Gain coefficient after differential; The first intermediate value controlled through PD is obtained according to DG Differential Gain coefficient and the first difference.Further, if when the first difference after differential calculation is less than the first setting value, then the DG Differential Gain coefficient that PD controls is the first gain coefficient; If the first difference after differential calculation is greater than the first setting value and is less than the second setting value, then DG Differential Gain coefficient linearly increases to the second gain coefficient from the first gain coefficient, and wherein, the second gain coefficient is greater than the first gain coefficient; If the DG Differential Gain coefficient after differential calculation is greater than the second setting value, then DG Differential Gain coefficient remains the second gain coefficient.Because derivative unit is according to the first difference determination DG Differential Gain coefficient, and the first difference is subtracted each other according to the speed setting value of generator and the rotating speed measured value of generator, therefore the DG Differential Gain of the PD controller of kinematic nonlinearity regulator generator is achieved, thus ensure that the rotating speed-change oar speed closed loop control of generator in the power per liter process of generator, the control achieving generator speed-generator electromagnetic torque possesses less overshoot, faster system response time and good system phase nargin.
Particularly, as shown in Figure 4, when the input (the first difference) of PD controller is less than the first setting value a0, the DG Differential Gain coefficient of PD controller is the first gain coefficient b0=1.0; And when the input (the first difference) of PD controller is between the first setting value a0 and the second setting value a1, the DG Differential Gain coefficient of PD controller linearly increases to the second gain coefficient b1 (b1 > 1.0) from the first gain coefficient b0; When the input (the first difference) of PD controller is greater than the second setting value a1, the DG Differential Gain coefficient of PD controller remains b1.
Step 305, the oar speed and second that to become first become oar speed and are added, and obtain the change oar speed setting value getting blower fan.
Step 306, obtain the first electromagnetic torque of generator at the second cabin acceleration in the direction vertical with direction of the wind comes from according to the cabin of blower fan.
Preferably, within step 306, first, integration can be carried out at the second cabin acceleration in the direction vertical with direction of the wind comes from the cabin of blower fan; Secondly, the second cabin acceleration after integration is carried out bandpass filtering by band-pass filter; Finally, the second cabin acceleration (unit is m/s) after bandpass filtering can be multiplied by the second proportional gain, obtain the first electromagnetic torque (unit is Ns), this second proportional gain is constant, and dimension is determined by the second cabin acceleration and the first electromagnetic torque.
Step 307, obtain the second electromagnetic torque according to the speed setting value of generator and the rotating speed measured value of generator.
Preferably, in step 307, the speed setting value of generator and the rotating speed measured value of generator are subtracted each other, obtains the second difference; Second difference is carried out proportional integral (Proportional Integration, referred to as PI) controlling calculation and obtain the second intermediate value; Second intermediate value is carried out lower pass-filter, obtains the second electromagnetic torque.
Step 308, the first electromagnetic torque to be added with the second electromagnetic torque, to obtain the electromagnetic torque setting value of blower fan.
Step 309, change oar speed setting value and electromagnetic torque setting value are inputed to blower fan, so that blower fan regulates the power per liter speed of blower fan in power per liter process according to change oar speed setting value and electromagnetic torque setting value.
It will be understood by those skilled in the art that, first by change oar speed setting value that step 303 ~ step 305 obtains, the execution sequence only exemplarily property explanation of the electromagnetic torque setting value obtained by above-mentioned steps 306 ~ step 308 afterwards, also can first by electromagnetic torque setting value that step 306 ~ step 308 obtains, again by change oar speed setting value that step 303 ~ step 305 obtains, step 303 ~ step 305 can also be performed simultaneously, step 306 ~ step 308, thus obtain becoming oar speed setting value and electromagnetic torque setting value simultaneously, the embodiment of the present invention does not limit the priority specifically obtaining becoming oar speed setting value and electromagnetic torque setting value.
Fig. 5 is the schematic diagram by the unit step response of notch filter in prior art, Fig. 6 be embodiment illustrated in fig. 3 in control the schematic diagram of unit step response by PD, see Fig. 5 and Fig. 6, abscissa representing time (Time), unit is second (sec), the amplitude (Amplitude) of y coordinate representation unit step response, from Fig. 5 and Fig. 6 relatively can find out, when the straight drive blower of 2.5Mw is in normal working, amplitude is-1, in the power per liter process of blower fan, prior art is when adopting larger PD ride gain and the larger notch filter of trap amplitude, can see from Fig. 5 and know that the blower fan rotating speed about the 6th second time-change oar speed closed loop PD controls unit step response into-1.6, now system overshoot is close to ([-1.6-(-1)/(-1)] × 100%=60%, and the rotating speed-change oar speed closed loop PD unit step response of rear motor is controlled by the PD that the embodiment of the present invention adopts, as shown in Figure 6, be ([-1.3-(-1)/(-1)] × 100%=30% during after fan starting about the 7th second of system overshoot, 30% is dropped to compared with the prior art shown in Fig. 5, thus avoid the operation unstability of blower fan, avoid becoming oar speed, generator speed, generator electromagnetic torque setting value, the low frequency fluctuation such as blower fan output power.
3rd embodiment:
The structural representation of the power per liter operating control device of the blower fan that Fig. 7 provides for one embodiment of the invention; As shown in Figure 7, this device comprises:
First acquisition module 41, for obtaining the change oar speed setting value of blower fan at the rotating speed measured value of the first cabin acceleration in direction of the wind comes from and the generator of blower fan according to the cabin of blower fan;
Second acquisition module 42, for obtaining the electromagnetic torque setting value of generator at the second cabin acceleration in the direction vertical with direction of the wind comes from and the rotating speed measured value of generator according to cabin;
Transmission module 43, the electromagnetic torque setting value obtained for the change oar speed setting value that obtained by the first acquisition module 41 and the second acquisition module 42 inputs to blower fan, so that blower fan regulates the power per liter speed of blower fan in power per liter process according to change oar speed setting value and electromagnetic torque setting value.
The power per liter operating control device of the blower fan that the embodiment of the present invention provides, by direction of the wind comes from, first cabin acceleration of direction this both direction perpendicular with direction of the wind comes from and the rotating speed measured value of the second cabin acceleration and generator, first acquisition module 41 and the second acquisition module 42 obtain change oar speed setting value and the electromagnetic torque setting value of blower fan respectively, thus make blower fan regulate according to change oar speed setting value and electromagnetic torque setting value the power per liter speed becoming oar and regulate blower fan in power per liter process, unstability and generator speed such as to be overrun at the fault can effectively to avoid blower fan to occur in running, ensure generator power per liter speed faster, thus blower fan can be made to carry more power to electrical network, in addition, can also avoid becoming oar speed, generator speed, generator electromagnetic torque setting value, blower fan output power significantly low-frequency fluctuation and generator fault of overrunning occur.
4th embodiment:
The structural representation of the power per liter operating control device of the blower fan that Fig. 8 provides for another embodiment of the present invention; As shown in Figure 8, in the technological scheme of embodiment described in above-mentioned Fig. 7 and the basis of Advantageous Effects, the power per liter operating control device that the embodiment of the present invention provides also comprises:
3rd acquisition module 44, for obtaining the peak-to-peak value of generator speed according to the generator speed measured value of blower fan;
4th acquisition module 45, for obtaining the speed setting value of generator according to the peak-to-peak value of generator speed.
Further, the 4th acquisition module 45 specifically can comprise: monitoring cell 451 and processing unit 452; Wherein, in the power per liter process that the output power of blower fan increases from small to large, the fluctuating range of peak-to-peak value when rotating speed low frequency of monitoring cell 451 Real-Time Monitoring generator; The output power setting value of generator, under the fluctuating range of peak-to-peak value meets the condition of predetermined threshold value, is opened cube divided by after optimal control gain, is obtained the rotary speed setting value of generator by processing unit 452.
Further, the first acquisition module 41 specifically can comprise: the first acquiring unit 411, second acquisition unit 412, adder unit 413; Wherein, the first acquiring unit 411 obtains the first change oar speed according to the cabin of blower fan at the first cabin acceleration in direction of the wind comes from; Second acquisition unit 412 obtains second according to the rotating speed measured value of the speed setting value of generator and generator and becomes oar speed; Adder unit 413 becomes oar speed and second according to first and becomes the change oar speed setting value that oar speed obtains blower fan.
Further, the first acquiring unit 411 specifically can comprise: the first bandpass filtering subelement, second-order filter subelement and the first multiplication subelement (not shown); Wherein, bandpass filtering is carried out at the first cabin acceleration in direction of the wind comes from the cabin of blower fan by the first bandpass filtering subelement; This after bandpass filtering first cabin acceleration is carried out filtering by second order filter by second-order filter subelement; First multiplication subelement, is multiplied by the first proportional gain by the described first cabin acceleration after second-order filter, obtains the first change oar speed.
Further, second acquisition unit 412 also can comprise: the first subtraction subelement, PD scintilla unit, the second lower pass-filter subelement (not shown); Wherein, the speed setting value of generator and the rotating speed measured value of generator subtract each other by the first subtraction subelement, obtain the first difference; PD scintilla unit carries out PD controlling calculation according to the first difference and obtains the first intermediate value; First intermediate value is carried out lower pass-filter by the second lower pass-filter subelement, obtains the second change oar speed.
Further, PD scintilla unit comprises: derivative unit and PD controller; Wherein, the first difference is carried out differential calculation by derivative unit, by the first difference determination DG Differential Gain coefficient after differential; PD controller obtains the first intermediate value controlled through PD according to DG Differential Gain coefficient and the first difference; Because derivative unit is according to the first difference determination DG Differential Gain coefficient, and the first difference is subtracted each other according to the speed setting value of generator and the rotating speed measured value of generator, therefore the DG Differential Gain of the PD controller of dynamic adjustments motor is achieved, thus ensure that the rotating speed-change oar speed closed loop control of motor in the power per liter process of motor, the control achieving motor speed-generator electromagnetic torque possesses less overshoot, faster system response time and good system phase nargin.
Further, DG Differential Gain coefficient determined in the following way by derivative unit: if when the first difference after differential calculation is less than the first setting value, then the DG Differential Gain coefficient that PD controls is the first gain coefficient; If the first difference after differential calculation is greater than the first setting value and is less than the second setting value, then DG Differential Gain coefficient linearly increases to the second gain coefficient from the first gain coefficient, and wherein, the second gain coefficient is greater than the first gain coefficient; If the DG Differential Gain coefficient after differential calculation is greater than the second setting value, then DG Differential Gain coefficient remains the second gain coefficient.
Further, the second acquisition module 42 specifically can comprise: the 3rd acquiring unit 421, the 4th acquiring unit 422, the 5th acquiring unit 423; Wherein, the 3rd acquiring unit 421 obtains the first electromagnetic torque of generator at the second cabin acceleration in the direction vertical with direction of the wind comes from according to the cabin of blower fan; 4th acquiring unit 422 obtains the second electromagnetic torque according to the speed setting value of generator and the rotating speed measured value of generator; 5th acquiring unit 423 obtains the electromagnetic torque setting value of blower fan according to the first electromagnetic torque and the second electromagnetic torque.
Further, the 3rd acquiring unit 421 can comprise: integration subelement, the second bandpass filtering subelement, the second multiplication subelement; Wherein, integration is carried out at the second cabin acceleration in the direction vertical with direction of the wind comes from the cabin of blower fan by integration subelement; The second cabin acceleration after integration is carried out bandpass filtering by the second bandpass filtering subelement; The second cabin acceleration after bandpass filtering is multiplied by the second proportional gain by the second multiplication subelement, obtains the first electromagnetic torque.
Further, the 4th acquiring unit 422 comprises: the second subtraction subelement, PI control subelement, the 3rd lower pass-filter subelement; Wherein, the speed setting value of generator and the rotating speed measured value of generator subtract each other by the second subtraction subelement, obtain the second difference; Second difference is carried out PI controlling calculation and is obtained the second intermediate value by PI control subelement; Second intermediate value is carried out lower pass-filter by the 3rd lower pass-filter subelement, obtains the second electromagnetic torque.
The structural representation of the power per liter operation control system of the blower fan that Fig. 9 provides for one embodiment of the invention; As shown in Figure 9, the power per liter operation control system that the embodiment of the present invention provides comprises: Bian Jiang actuator 61, current transformer 62 and above-mentioned Fig. 7 or embodiment illustrated in fig. 8 in the power per liter operating control device 63 of blower fan.
Wherein, after the power per liter operating control device 63 of blower fan obtains becoming oar speed setting value and electromagnetic torque setting value by the power per liter progress control method of above-mentioned Fig. 1 or blower fan embodiment illustrated in fig. 3, change oar speed setting value is inputed to Bian Jiang actuator 61, and electromagnetic torque setting value inputs to current transformer 62; Bian Jiang actuator 61 becomes oar speed according to the adjustment of change oar speed setting value, and current transformer 62 is according to electromagnetic torque setting value adjustment generator speed, thus the power per liter speed of regulator generator in power per liter process.
Embodiment five:
The circuit structure diagram of the power per liter operation control system of the blower fan that Figure 10 provides for a specific embodiment of the present invention; As shown in Figure 10, in a specific embodiment, fore-and-aft direction (the fore-aft direction in the cabin of blower fan (WT) 90 will be arranged on, or the direction of the wind comes from) the first cabin acceleration signal, after band-pass filter 911, second order filter 920 and proportional gain module 931, obtain one first and become oar speed, what adder 941 became first that oar speed and PD control module 950 calculate second becomes oar speed setting value and is added, thus obtain becoming oar speed setting value, this change oar speed setting value is inputed to the Bian Jiang actuator of blower fan 90.
By be arranged in blower fan 90 cabin with the direction of the wind comes from vertical (side-side direction) the second cabin acceleration, first vibration velocity signal is obtained through an integration module 960 according to the first cabin acceleration in side-side direction, cabin, this vibration velocity signal is through band-pass filter 912 and proportional gain module 932 afterwards, obtain first electromagnetic torque, this first electromagnetic torque and the second electromagnetic torque (this second electromagnetic torque be calculated by PI controller 980 and after low-pass filter 973 lower pass-filter electromagnetic torque) be added by adder 942, thus obtain electromagnetic torque setting value, this electromagnetic torque setting value is inputed to the current transformer actuator of blower fan 90.In addition, generator speed measured value is after low-pass filter 971 filtering, with generator speed setting value by subtractor 943 obtain more afterwards both difference (the first difference in the embodiment of the present invention), first difference is by after differential module 951 differential, the DG Differential Gain coefficient of PD controller 953 is determined by DG Differential Gain determination module 952, the output of PD controller 953, after low-pass filter 954 filtering, obtains the second change oar speed.
For the signal of generator speed measured value after low-pass filter 971 filtering, after the 3rd acquisition module 44, in the power per liter process increased from small to large in blower fan output power by the 4th acquisition module 45 in embodiment illustrated in fig. 8, Real-Time Monitoring is carried out to generator speed low-frequency fluctuation amplitude, if low frequency peak-to-peak value wave range exceedes specified value, the speed of timely downward power per liter, now generated output power setting value increases according to the speed after adjustment, generated output power setting value opens cube divided by optimal control gain just can obtain generator speed setting value.
After getting generator speed setting value by the 4th acquisition module 45, after generator speed setting value is subtracted each other by subtractor 944 and generator speed measured value, as the input of PI controller 980.
Wherein, in embodiments of the present invention, the first bandpass filtering subelement, second-order filter subelement, the first multiplication subelement in the first band-pass filter 911, second order filter 912, corresponding above-mentioned first acquiring unit 411 embodiment illustrated in fig. 8 of proportional gain module 931 difference; Integration subelement, the second bandpass filtering subelement, the second multiplication subelement in corresponding above-mentioned 3rd acquiring unit 431 embodiment illustrated in fig. 8 of integration module 960, second band-pass filter 912, proportional gain module 932 difference; Subtractor 944, PI controller 980, low-pass filter 973 correspond respectively to the second subtraction subelement in above-mentioned 4th acquiring unit 422 embodiment illustrated in fig. 8, PI controls subelement, the 3rd lower pass-filter subelement; Adder 942 corresponding above-mentioned embodiment illustrated in fig. 8 in the 5th acquiring unit 423.Subtractor 943 and PD control module 950 are included in above-mentioned second acquisition unit 412 embodiment illustrated in fig. 8, the corresponding first subtraction subelement of subtractor 943, DG Differential Gain determination module 952, PD controller 953 are included in above-mentioned PD scintilla unit embodiment illustrated in fig. 8.It will be understood by those skilled in the art that, the circuit structure of the embodiment of the present invention can not form the restriction to the embodiment of the present invention, as long as can realize being with the circuit structure of the embodiment of the present invention phase identical functions technological scheme that the embodiment of the present invention contains.
Pass through said structure, be transported in the grid power power per liter process ascending with speed faster at blower fan 90, can kinematic nonlinearity regulator generator rotating speed-change oar speed closed loop PD control in DG Differential Gain, thus reach and significantly reduce generator speed-change oar speed close loop control circuit system overshoot, significantly elevator system phase margin, significantly reduce the technique effect becoming oar speed low-frequency fluctuation amplitude, thus solve the large and generator speed of generator speed, blade loading, tower cylinder load low-frequency fluctuation amplitude and to overrun the technical problems such as fault.
The schematic diagram of the Steady Wind of 15m/s of Figure 11 for adopting in the embodiment of the present invention, Figure 12 to be the embodiment of the present invention with prior art become in 50Kw/s power per liter process oar speed compare schematic diagram, Figure 13 generator speed that is the embodiment of the present invention with prior art in 50Kw/s power per liter process compare schematic diagram, Figure 14 be the embodiment of the present invention with the output power of prior art blower fan in 50Kw/s power per liter process compare schematic diagram, Figure 15 be the embodiment of the present invention with the moment of flexure of prior art in 50Kw/s power per liter process bottom tower cylinder under direction of the wind comes from acts on (referred to as My moment of flexure bottom tower cylinder) compare schematic diagram, Figure 16 blade root that is the embodiment of the present invention with prior art in 50Kw/s power per liter process wave direction moment of flexure (referred to as blade root My moment of flexure) compare schematic diagram, below by Figure 11 ~ Figure 16, the Advantageous Effects of the various embodiments described above of the present invention is described in more details.
Under the Steady Wind effect of the 15m/s shown in Figure 11, with the speed of 50Kw/s, the output power of straight for 2.5Mw drive blower is increased to 2.5Mw power per liter process from 1.5Mw, become the comparison of My moment of flexure, blade root My moment of flexure bottom oar speed, generator speed, blower fan output power, tower cylinder, wherein solid line is the scheme of prior art, and dotted line represents the technological scheme of the embodiment of the present invention.After can finding out from Figure 12 ~ Figure 16 the technological scheme adopting the embodiment of the present invention, bottom becoming oar speed, generator speed, blower fan output power, tower cylinder, the low-frequency fluctuation amplitude such as My moment of flexure, blade root My moment of flexure significantly decays.Unstability and generator speed are overrun fault can effectively to avoid fan operation to occur, bottom blade root My moment of flexure, tower cylinder, My bending load significantly reduces.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (23)
1. a power per liter progress control method for blower fan, is characterized in that, described method comprises:
Obtain the change oar speed setting value of described blower fan at the rotating speed measured value of the first cabin acceleration in direction of the wind comes from and the generator of described blower fan according to the cabin of blower fan;
Obtain the electromagnetic torque setting value of described generator at the second cabin acceleration in the direction vertical with described direction of the wind comes from and the rotating speed measured value of described generator according to described cabin;
Described change oar speed setting value and described electromagnetic torque setting value are inputed to described blower fan, so that described blower fan regulates the power per liter speed of described blower fan in power per liter process according to described change oar speed setting value and described electromagnetic torque setting value.
2. the power per liter progress control method of blower fan according to claim 1, is characterized in that, described method also comprises:
The peak-to-peak value of the rotating speed of described generator is obtained according to the generator speed measured value of described blower fan;
The speed setting value of described generator is obtained according to described peak-to-peak value.
3. the power per liter progress control method of blower fan according to claim 2, is characterized in that, the step obtaining the speed setting value of described generator according to described peak-to-peak value comprises:
In the power per liter process that the output power of described blower fan increases from small to large, the fluctuating range of peak-to-peak value when rotating speed low frequency of the rotating speed of generator described in Real-Time Monitoring;
Meet the condition of predetermined threshold value in the fluctuating range of described peak-to-peak value under, the output power setting value of described generator is opened cube divided by after optimal control gain, obtains the rotary speed setting value of described generator.
4. the power per liter progress control method of the blower fan according to Claims 2 or 3, it is characterized in that, the step that the described cabin according to blower fan obtains the change oar speed setting value of described blower fan at the rotating speed measured value of the first cabin acceleration in direction of the wind comes from and the generator of described blower fan comprises:
Obtain first according to the cabin of blower fan at the first cabin acceleration in direction of the wind comes from and become oar speed;
Obtain second according to the speed setting value of described generator and the rotating speed measured value of described generator and become oar speed;
Described first change oar speed and described second are become oar speed be added, obtain the change oar speed setting value of described blower fan.
5. the power per liter progress control method of blower fan according to claim 4, is characterized in that, the described cabin according to blower fan obtains the first step becoming oar speed at the first cabin acceleration in direction of the wind comes from and comprises:
Bandpass filtering is carried out at the first cabin acceleration in direction of the wind comes from the cabin of described blower fan;
Described first cabin acceleration after bandpass filtering is carried out filtering by second order filter;
Described first cabin acceleration after second-order filter is multiplied by the first proportional gain, obtains the first change oar speed.
6. the power per liter progress control method of blower fan according to claim 4, is characterized in that, the rotating speed measured value of the described speed setting value according to described generator and described generator obtains the second step becoming oar speed and comprises:
The rotating speed measured value of the speed setting value of described generator and described generator is subtracted each other, obtains the first difference;
Carry out PD controlling calculation according to described first difference and obtain the first intermediate value;
Described first intermediate value is carried out lower pass-filter, obtains the second change oar speed.
7. the power per liter progress control method of blower fan according to claim 6, is characterized in that, describedly carries out according to described first difference the step that PD controlling calculation obtains the first intermediate value and comprises:
Described first difference is carried out differential calculation, by the described first difference determination DG Differential Gain coefficient after differential;
The first intermediate value controlled through described PD is obtained according to described DG Differential Gain coefficient and described first difference.
8. the power per liter progress control method of blower fan according to claim 7, is characterized in that, the described step by the described first difference determination DG Differential Gain coefficient after differential comprises:
If when described first difference after differential calculation is less than the first setting value, then the DG Differential Gain coefficient that described PD controls is the first gain coefficient;
If described first difference after differential calculation is greater than described first setting value and is less than the second setting value, then described DG Differential Gain coefficient linearly increases to the second gain coefficient from described first gain coefficient, wherein, described second gain coefficient is greater than described first gain coefficient;
If the described DG Differential Gain coefficient after differential calculation is greater than the second setting value, then described DG Differential Gain coefficient remains described second gain coefficient.
9. the power per liter progress control method of blower fan according to claim 2, it is characterized in that, the described step obtaining the electromagnetic torque setting value of described generator at the second cabin acceleration in the direction vertical with described direction of the wind comes from and the rotating speed measured value of described generator according to described cabin comprises:
Obtain the first electromagnetic torque of described generator at the second cabin acceleration in the direction vertical with described direction of the wind comes from according to the cabin of blower fan;
The second electromagnetic torque is obtained according to the speed setting value of described generator and the rotating speed measured value of described generator;
The electromagnetic torque setting value of described blower fan is obtained according to described first electromagnetic torque and described second electromagnetic torque.
10. the power per liter progress control method of blower fan according to claim 9, is characterized in that, the described step obtaining the first electromagnetic torque of described generator at the second cabin acceleration in the direction vertical with described direction of the wind comes from according to the cabin of blower fan comprises:
Integration is carried out at the second cabin acceleration in the direction vertical with described direction of the wind comes from the cabin of described blower fan;
Described second cabin acceleration after integration is carried out bandpass filtering by band-pass filter;
Described second cabin acceleration after bandpass filtering is multiplied by the second proportional gain, obtains the first electromagnetic torque.
The power per liter progress control method of 11. blower fans according to claim 9 or 10, is characterized in that, the step that the rotating speed measured value of the described speed setting value according to described generator and described generator obtains the second electromagnetic torque comprises:
The rotating speed measured value of the speed setting value of described generator and described generator is subtracted each other, obtains the second difference;
Described second difference is carried out PI controlling calculation and obtains the second intermediate value;
Described second intermediate value is carried out lower pass-filter, obtains the second electromagnetic torque.
The power per liter operating control device of 12. 1 kinds of blower fans, is characterized in that, the power per liter operating control device of described blower fan comprises:
First acquisition module, for obtaining the change oar speed setting value of described blower fan at the rotating speed measured value of the first cabin acceleration in direction of the wind comes from and the generator of described blower fan according to the cabin of blower fan;
Second acquisition module, for obtaining the electromagnetic torque setting value of described generator at the second cabin acceleration in the direction vertical with described direction of the wind comes from and the rotating speed measured value of described generator according to described cabin;
Transmission module, for described change oar speed setting value and described electromagnetic torque setting value are inputed to described blower fan, so that described blower fan regulates the power per liter speed of described blower fan in power per liter process according to described change oar speed setting value and described electromagnetic torque setting value.
The power per liter operating control device of 13. blower fans according to claim 12, is characterized in that, the power per liter operating control device of described blower fan also comprises:
3rd acquisition module, for obtaining the peak-to-peak value of described generator speed according to the generator speed measured value of described blower fan;
4th acquisition module, for obtaining the speed setting value of described generator according to described peak-to-peak value.
The power per liter operating control device of 14. blower fans according to claim 13, is characterized in that, described 4th acquisition module comprises:
Monitoring cell, in the power per liter process that increases from small to large in the output power of described blower fan, the fluctuating range of peak-to-peak value when rotating speed low frequency of the rotating speed of generator described in Real-Time Monitoring;
Processing unit, for when the fluctuating range dynamic conditioning power per liter speed of described peak-to-peak value meets predefined value, opens cube by the output power setting value of described generator divided by after optimal control gain, obtains the rotary speed setting value of described generator.
The power per liter operating control device of 15. blower fans according to claim 13 or 14, it is characterized in that, described first acquisition module comprises:
First acquiring unit, becomes oar speed for obtaining first according to the cabin of blower fan at the first cabin acceleration in direction of the wind comes from;
Second acquisition unit, becomes oar speed for obtaining second according to the speed setting value of described generator and the rotating speed measured value of described generator;
Adder unit, is added for described first change oar speed and described second are become oar speed, obtains the change oar speed setting value of described blower fan.
The power per liter operating control device of 16. blower fans according to claim 15, is characterized in that, described first acquiring unit comprises:
First bandpass filtering subelement, for carrying out bandpass filtering by the cabin of described blower fan at the first cabin acceleration in direction of the wind comes from;
Second-order filter subelement, for carrying out filtering by the described first cabin acceleration after bandpass filtering by second order filter;
First multiplication subelement, for the described first cabin acceleration after second-order filter is multiplied by the first proportional gain, obtains the first change oar speed.
The power per liter operating control device of 17. blower fans according to claim 15, is characterized in that, described second acquisition unit comprises:
First subtraction subelement, for being subtracted each other by the rotating speed measured value of the speed setting value of described generator and described generator, obtains the first difference;
PD scintilla unit, obtains the first intermediate value for carrying out PD controlling calculation according to described first difference;
Second lower pass-filter subelement, for described first intermediate value is carried out lower pass-filter, obtains the second change oar speed.
The power per liter operating control device of 18. blower fans according to claim 17, is characterized in that, described PD scintilla unit comprises:
Derivative unit, for described first difference is carried out differential calculation, by the described first difference determination DG Differential Gain coefficient after differential;
PD controller, for the first intermediate value obtaining controlling through described PD according to described DG Differential Gain coefficient and described first difference.
The power per liter operating control device of 19. blower fans according to claim 18, is characterized in that, described DG Differential Gain coefficient determined in the following way by described derivative unit:
If when described first difference after differential calculation is less than the first setting value, then the DG Differential Gain coefficient that described PD controls is the first gain coefficient;
If described first difference after differential calculation is greater than described first setting value and is less than the second setting value, then described DG Differential Gain coefficient linearly increases to the second gain coefficient from described first gain coefficient, wherein, described second gain coefficient is greater than described first gain coefficient;
If the described DG Differential Gain coefficient after differential calculation is greater than the second setting value, then described DG Differential Gain coefficient remains described second gain coefficient.
The power per liter operating control device of 20. blower fans according to claim 13, is characterized in that, described second acquisition module comprises:
3rd acquiring unit, for obtaining the first electromagnetic torque of described generator at the second cabin acceleration in the direction vertical with described direction of the wind comes from according to the cabin of blower fan;
4th acquiring unit, for obtaining the second electromagnetic torque according to the speed setting value of described generator and the rotating speed measured value of described generator;
5th acquiring unit, for obtaining the electromagnetic torque setting value of described blower fan according to described first electromagnetic torque and described second electromagnetic torque.
The power per liter operating control device of 21. blower fans according to claim 20, is characterized in that, described 3rd acquiring unit comprises:
Integration subelement, for carrying out integration by the cabin of described blower fan at the second cabin acceleration in the direction vertical with described direction of the wind comes from;
Second bandpass filtering subelement, for carrying out bandpass filtering by the described second cabin acceleration after integration by band-pass filter;
Second multiplication subelement, for the described second cabin acceleration after bandpass filtering is multiplied by the second proportional gain, obtains the first electromagnetic torque.
The power per liter operating control device of 22. blower fans according to claim 20 or 21, it is characterized in that, described 4th acquiring unit comprises:
Second subtraction subelement, for being subtracted each other by the rotating speed measured value of the speed setting value of described generator and described generator, obtains the second difference;
PI controls subelement, obtains the second intermediate value for described second difference is carried out PI controlling calculation;
3rd lower pass-filter subelement, for described second intermediate value is carried out lower pass-filter, obtains the second electromagnetic torque.
The power per liter operation control system of 23. 1 kinds of blower fans, is characterized in that, the power per liter operation control system of described blower fan comprises:
The power per liter operating control device of the arbitrary described blower fan of Bian Jiang actuator, current transformer and claim 12 ~ 22; Wherein,
The power per liter operating control device of described blower fan calculates and becomes oar speed setting value and electromagnetic torque setting value, and described change oar speed setting value and described electromagnetic torque setting value are inputed to described Bian Jiang actuator and described current transformer respectively;
Described Bian Jiang actuator becomes oar speed according to described change oar speed setting value adjustment;
Described current transformer according to described electromagnetic torque setting value adjustment generator speed, thus regulates the power per liter speed of described generator in power per liter process.
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